Can you just stop by?

C: when you get a moment could you stop by my office?
Me: your office is 30 minutes out of my way on a good day. I can set an appointment for x day at x time.
C: oh it isn’t that important
Me: ok, so call to make an appointment when it is important
C: do you have time tomorrow or Friday to come out?
Me: let me look at the dispatch portal.